Help! LAN card is down.

Help! LAN card is down.

Post by Gabor Schme » Wed, 15 Jun 1994 09:52:58



I'm sorry if this is a stupid question, but i'm stuck, need help.

I'm trying to hook-up my hp 700. It came with
2 ethernet cards, i want to use lan0.

Sam won't enable lan0, and lanscan reports DOWN for the
hardware state.

I did everything according to 'Installing and Administering LAN/900
Software'.

Is this a faulty card ?

Any help is appreciated.

Gabe Schmera

 
 
 

Help! LAN card is down.

Post by Bill Hasse » Fri, 17 Jun 1994 21:47:42


: Sam won't enable lan0, and lanscan reports DOWN for the
: hardware state.

  lanscan (and landiag) check the selftest state of the LAN card.  The most
  common problem is that a valid LAN connection is not present.  For thinlan
  (ie, a BNC connector), two (2) terminators must be present on the LAN
  cable and the CPU must be plugged into the LAN.  Otherwise, the LAN card
  fails selftest and produces the DOWN state.  Similarly for AUI and twisted
  pair cables.

--

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Help! LAN card is down.

Post by Angela B » Sat, 18 Jun 1994 03:29:10




> : Sam won't enable lan0, and lanscan reports DOWN for the
> : hardware state.
>   lanscan (and landiag) check the selftest state of the LAN card.  The most
>   common problem is that a valid LAN connection is not present.  For thinlan
>   (ie, a BNC connector), two (2) terminators must be present on the LAN
>   cable and the CPU must be plugged into the LAN.  Otherwise, the LAN card
>   fails selftest and produces the DOWN state.  Similarly for AUI and twisted
>   pair cables.

In most cases, if your machine was booted up without a valid LAN present,
you have to go into 'landiag' to 'reset' the interface, otherwise,
it will remain in DOWN state.   Same goes if you took off the LAN cable long
enough for it to go to DOWN state, it will not get back to the UP state
unless you maually do a reset.

Why doesn't HP-UX automatically recognize the new presence of a LAN?
Our software heavily rely on the LAN.  There have been cases where the
users kicked the connected off (ya I know, should have secure it better,
but our hardware guys did the job :-8 ) and the software just waits
forever for the LAN to come back.  They ended up resetting the LAN interface
everytime they do a retry.  

Why is it the way it is?  Curious minds like to know...

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Angela Bao -- Project Peace Shield              |  #include <std.disclaimer>

 Sys Admin    Sector XXX, don't ask me which one...
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1. Help about lan card

Yes, It's a jumper.

HP Apollo 9000 Series 400 Installation guide describes it.

Step 1 is Opening up the System Unit

2 Changing the 802.3 Network Jumper Setting

To change the 802.3 Network from the factory-shipped default
setting for the internal Transceiver to the External Transceiver
setting, change the jumper on the CPU board as shown in the
illustration. Use an extractor tool to change the jumpers. Replace the
processor board and outside panel as described in Step 1.

3 Connecting to the 802.3 Network (Ethernet)

You can connect to the 802.3 network by using either the external
transceiver (LAN AUI) or the internal transceiver (thin LAN).

To use the external transceiver, you must have aleady performed Steps 1
and 2. Connect LAN AUI cable as shown.

...

I can't show you the illustration but when you open the
HP Apollo 9000 Series 400, the jumper is very near the AUI port.
Jumpers have two positions :

  - Internal (Default) Tansceiver Select --- Thin LAN
  - External Tranceiver Select          --- AUI  LAN

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